81 x 9 = 801. What must you do to make the this equation true?

John's five friends Rachel, Jacob, Phoebe, Joey and Chandler live on the same road.

Rachel lives in the house: A, Jacob lives in the house: B, Phoebe lives in the house: C, Joey lives in the house:D, Chandler lives in the house: E

Mathematically
B*C*D = 1260
B + C + D = 2E
2A = E

The road numbers run from 2 to 222.

Can you tell me the house number of each of John's friends?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

What's a single-digit number with no value?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

Why is the Hole below a Lock?

Can you identify if it's a murder or a suicide ?

I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?

What have one eye but still cannot see?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?